General Motors — Checking Transmission Fluid Level
Maintenance
From a General Motors owner's manual covering: Carb 5.7L, MP 5.0L, MP 5.7L, MP 6.0L. Check it applies to your exact model before use.
Before you start
- Do not attempt to remove the transmission dipstick while the engine is running. Hot transmission fluid could be sprayed from the dipstick hole.
Procedure
- Remove the dipstick by turning the T-handle counterclockwise; observe the fluid level; replace and tighten securely.
- Operate the engine until the engine and transmission reach operating temperature.
- Stop the engine and quickly check the fluid level to minimize drain-back from the oil cooler.
- The fluid level should be at the FULL or MAX mark; if low, add the specified fluid through the dipstick tube.
- Replace the dipstick and tighten securely.
Source: General Motors owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.